#include <iostream>

using namespace std;
int main() {
    double weight,height,BMI;
    scanf("%lf%lf",&weight,&height);
    BMI=weight/(height*height);
    if (BMI>0&&BMI<18.5){
        printf("Underweight");
    }else if (BMI>=18.5 && BMI<24){
        printf("Normal");
    }else if (BMI>=24){
        printf("BMI:%lf Overweight");
    }
    return 0;
}
